Ensure new months pop up dynamically on Bar Chart

I have a stacked bar chart for each month since December '18. When I initially made this chart back in June, I had set my chart to show the months from Dec '18 to June '19. When the data for July started coming in, I wanted the July '19 bar to automatically pop up on the chart next to June’s bar, but it didn’t so I went in and manually changed the settings allowing for July’s data to show.

Is there a way I can now ensure that when August begins and August’s data comes in, a bar will pop up for August '19 on this chart? I don’t want to have to manually go in to all my charts at the beginning of every month and change the settings.

Thank you!